GB770523A - Improvements in or relating to alternating current circuit arrangements employing transistors - Google Patents
Improvements in or relating to alternating current circuit arrangements employing transistorsInfo
- Publication number
- GB770523A GB770523A GB3575553A GB3575553A GB770523A GB 770523 A GB770523 A GB 770523A GB 3575553 A GB3575553 A GB 3575553A GB 3575553 A GB3575553 A GB 3575553A GB 770523 A GB770523 A GB 770523A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- impedance
- base
- transistor
- reactive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000003321 amplification Effects 0.000 abstract 2
- 239000003990 capacitor Substances 0.000 abstract 2
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000000903 blocking effect Effects 0.000 abstract 1
- 239000013078 crystal Substances 0.000 abstract 1
- 230000010363 phase shift Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B7/00—Generation of oscillations using active element having a negative resistance between two of its electrodes
- H03B7/02—Generation of oscillations using active element having a negative resistance between two of its electrodes with frequency-determining element comprising lumped inductance and capacitance
- H03B7/06—Generation of oscillations using active element having a negative resistance between two of its electrodes with frequency-determining element comprising lumped inductance and capacitance active element being semiconductor device
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
- H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
- H03B5/36—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device
- H03B5/362—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device the amplifier being a single transistor
Landscapes
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Abstract
770,523. Transistor negative impedance amplifying and oscillating circuits; frequency modulation. MULLARD RADIO VALVE CO., Ltd. Nov. 5, 1954 [Dec. 23, 1953; Jan. 11, 1954], Nos. 35755/53 and 808/54. Classes 40(5) and 40(6) In a junction transistor circuit a reactive impedance is arranged in the emittercollector circuit which together with the phase shift occurring between the base and emitter currents makes the total exceed ninety degrees so that a negative resistance component appears in the base input impedance. An oscillator may be produced by employing an inductor L in the base lead', Fig. 1 (first Provisional Specification) the resistor RE and capacitor C forming the reactive impedance. Frequency modulation may be affected by varying the collector potential. The oscillator may be stabilized by a crystal X or series tuned circuit, Fig. 1 (second Provisional Specification) the reactive load being the circuit CE LE which is adjusted to be capacitive at the operating frequency. Amplification of signals from a source G, Fig. 6, feeding a load RL may be obtained by interposing a negative impedance circuit comprising a transistor with base impedance L and emitter reactive load REC, Rb serving as a base bias resistor, and Cb as a blocking capacitor. The resistor RL may be replaced by a transmission line, so that amplification takes place equally in both directions. The emitter circuit may be formed by a parallel circuit tuned to be capacitive at the operating frequency. According to the first Provisional Specification a point contact transistor may be employed and pulses generated by including an inductor in the collector lead shunted by a diode.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE534312D BE534312A (en) | 1953-12-23 | ||
GB3575553A GB770523A (en) | 1953-12-23 | 1953-12-23 | Improvements in or relating to alternating current circuit arrangements employing transistors |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3575553A GB770523A (en) | 1953-12-23 | 1953-12-23 | Improvements in or relating to alternating current circuit arrangements employing transistors |
Publications (1)
Publication Number | Publication Date |
---|---|
GB770523A true GB770523A (en) | 1957-03-20 |
Family
ID=10381220
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3575553A Expired GB770523A (en) | 1953-12-23 | 1953-12-23 | Improvements in or relating to alternating current circuit arrangements employing transistors |
Country Status (2)
Country | Link |
---|---|
BE (1) | BE534312A (en) |
GB (1) | GB770523A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0535883A1 (en) * | 1991-09-30 | 1993-04-07 | Motorola, Inc. | Voltage controlled oscillator employing negative resistance |
-
0
- BE BE534312D patent/BE534312A/xx unknown
-
1953
- 1953-12-23 GB GB3575553A patent/GB770523A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0535883A1 (en) * | 1991-09-30 | 1993-04-07 | Motorola, Inc. | Voltage controlled oscillator employing negative resistance |
Also Published As
Publication number | Publication date |
---|---|
BE534312A (en) |
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